Everyone has that one support that no matter what difficulty you're playing, no matter how many times you've beaten the game, no matter how close you are to 100%, no matter how much you want to see the other supports you always do.
What's that one support for you? And it doesn't have to be your OTP. It's just that pairing that feels... right.
For me, its Virion and Cherche. I don't care what modifiers or skills Virion gives Gerome, he has to marry Cherche. He has to. Who else is he going to reclaim his lands in Rossane with? Nowi?